51125051 has 2 divisors, whose sum is σ = 51125052. Its totient is φ = 51125050.

The previous prime is 51125027. The next prime is 51125077. The reversal of 51125051 is 15052115.

It is a happy number.

51125051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51125051 is a prime.

It is a super-2 number, since 2×51125051² = 5227541679505202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51145051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25562525 + 25562526.

It is an arithmetic number, because the mean of its divisors is an integer number (25562526).

Almost surely, 2^51125051 is an apocalyptic number.

51125051 is a deficient number, since it is larger than the sum of its proper divisors (1).

51125051 is an equidigital number, since it uses as much as digits as its factorization.

51125051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 51125051 is about 7150.1783893830. The cubic root of 51125051 is about 371.1458294345.

Adding to 51125051 its reverse (15052115), we get a palindrome (66177166).

The spelling of 51125051 in words is "fifty-one million, one hundred twenty-five thousand, fifty-one".